The contrast of the lighting always makes sunrise/sets a challenge. No real way to capture it without a good editor and some skill, and even then, you'll never beat having been there...
Someday I'll get a real editor, but I did toy around with blending a Sunrise from my phantom once, but with MS paint! lol
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Since the best flight times seem to be early morning, I bet more than a few of us have seen some good sunrises, maybe we should put up a few!